#define  _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main() {
	int a = 5;
	double z = 5 / 2.0;
	printf("%d\n", a / 2);
	printf("%d\n", a / 2.0);
	printf("%lf\n", a / 2.0);
	printf("%lf\n", z);
	return 0;
}